Voyage to the Bottom of the Sea (1964)

S1E25 Cradle of the Deep

Title: Abyssal Awakening Plot: An unconventional experiment aimed at accelerating the process of evolution spirals out of control, resulting in the emergence of a colossal protoplasmic creature. This monstrous entity poses a grave danger to the lives of the entire crew, forcing them to confront the unforeseen consequences of their scientific ambitions. As they scramble to survive, the crew must find a way to neutralize the threat before it’s too late.